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A measurement of material in the ATLAS tracker using secondary hadronic interactions in 7 TeV p p collisions
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0003-3867-0336
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0002-0299-8236
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0002-8913-0981
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Rekke forfattare: 28582016 (engelsk)Inngår i: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 11, artikkel-id P11020Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Knowledge of the material in the ATLAS inner tracking detector is crucial in under-standing the reconstruction of charged-particle tracks, the performance of algorithms that identify jets containing b-hadrons and is also essential to reduce background in searches for exotic particles that can decay within the inner detector volume. Interactions of primary hadrons produced in pp collisions with the material in the inner detector are used to map the location and amount of this material. The hadronic interactions of primary particles may result in secondary vertices, which in this analysis are reconstructed by an inclusive vertex-finding algorithm. Data were collected using minimum-bias triggers by the ATLAS detector operating at the LHC during 2010 at centre-of-mass energy root s = 7 TeV, and correspond to an integrated luminosity of 19 nb(-1). Kinematic properties of these secondary vertices are used to study the validity of the modelling of hadronic interactions in simulation. Secondary-vertex yields are compared between data and simulation over a volume of about 0.7m(3) around the interaction point, and agreement is found within overall uncertainties.

sted, utgiver, år, opplag, sider
IOP PUBLISHING LTD , 2016. Vol. 11, artikkel-id P11020
Emneord [en]
Detector modelling and simulations I (interaction of radiation with matter, interaction, of photons with matter, interaction of hadrons with matter, etc), Performance of High Energy Physics Detectors
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Identifikatorer
URN: urn:nbn:se:kth:diva-207462DOI: 10.1088/1748-0221/11/11/P11020ISI: 000395673100020OAI: oai:DiVA.org:kth-207462DiVA, id: diva2:1096897
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QC 20170519

Tilgjengelig fra: 2017-05-19 Laget: 2017-05-19 Sist oppdatert: 2019-12-19bibliografisk kontrollert

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Lund-Jensen, BengtSidebo, P. EdvinStrandberg, Jonas

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